Beam selection method, apparatus and system

ABSTRACT

Disclosed are a beam selection method, apparatus and system. The method comprises: a receiving device receives at least one set of beam associating information from a sending device, each set of which including an association relation between a first beam and at least one second beam; and selects, according to the information, a beam to be received among beams from the sending device, i.e., the receiving device may quickly select, according to the association relation between the first beam and the second beam, a beam to be received among beams from the sending device, so that the number of steps or measurements performed for the signal quality of beams during data receiving are reduced, thereby reducing the time spent on beam measurements, accelerating the process of beam measurement and selection of the receiving device, simplifying data receiving, and lowering the latency.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2017/083096, filed on May 4, 2017, entitled “Beam SelectionMethod, Apparatus and System”, which claims priority to InternationalApplication No. PCT/CN2016/113685, filed on Dec. 30, 2016, entitled“Beam Selection Method, Apparatus and System”, the disclosures of bothapplications are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the field of communication, and inparticular, to a beam selection method, apparatus and system.

BACKGROUND

The 5th generation mobile communication (5G) system is also known as thenew radio (NR) system, which introduces beamforming as one of its keytechnologies.

Beamforming refers to the formation of specific spatial directivity bysuperimposing signals transmitted by multiple antennas by assigningspecific weights to these antennas. In a 5G system, a sending device cansend beam signals to multiple receiving devices simultaneously throughdifferent beams, thereby realizing reuse of the same time-frequencyresources in different spaces (i.e., space division multiplexing),greatly increasing system capacity.

Accordingly, in a 5G system, a receiving device may simultaneouslydetect multiple beams sent by the sending device, and before receivingthe data sent by the sending device, the receiving device needs toseparately perform measurements on the multiple beams sent by thesending device to identify the beam with good signal quality among themultiple beams for the receiving, and the process of performingmeasurements on multiple beams sent by the sending device separatelyrequires more measurement time, resulting in high complexity and latencyof data reception.

SUMMARY

Embodiments of the present disclosure provide a beam selection method,device and system for solving the problem that the receiving deviceseparately performing measurements on the multiple beams sent by thesending device requires a large amount of measurement time, resulting inhigh complexity and latency of data reception. The technical solution isas follows.

According to a first aspect of the embodiments of the presentdisclosure, a beam selection method is provided, the method including:

receiving, by a receiving device, at least one set of beam associatinginformation sent by a sending device, each set of the beam associatinginformation including an association relation between a first beam andat least one second beam;

selecting, by the receiving device, according to the at least one set ofbeam associating information, a beam to be received among beams sent bythe sending device.

In an optional embodiment, the association relation between the firstbeam and the at least one second beam includes:

an association relation between a beam ID of the first beam and a beamID of the at least one second beam; and/or an association relationbetween a physical resource associated with the first beam and aphysical resource associated with each of the at least one second beam;and/or an association relation between a reference signal associatedwith the first beam and a reference signal associated with each of theat least one second beam.

In an optional embodiment, the reference signal includes:

a Demodulation Reference Signal (DMRS) used by an uplink physicalchannel of an associated beam transmission, and/or a channel SoundingReference Signal (SRS) used by an uplink physical channel of anassociated beam transmission;

or,

a Demodulation Reference Signal (DMRS) used by a downlink physicalchannel of an associated beam transmission, and/or a beam specificreference signal (RS) of an associated beam, and/or a channel stateinformation-reference signal (CSI-RS) of an associated beam.

In an optional embodiment, the association relation between the firstbeam and the at least one second beam further includes:

a first physical channel associated with the at least one second beam,and a second physical channel associated with the first beam.

In an optional embodiment, the selecting, by the receiving device,according to the at least one set of beam associating information, abeam to be received among beams sent by the sending device, includes:

when the receiving device receives the first physical channel through asecond beam, selecting the first beam associated with the second beam asa beam for receiving the second physical channel according to the atleast one set of beam associating information.

In an optional embodiment, the selecting, by the receiving device,according to the at least one set of beam associating information, abeam to be received among beams sent by the sending device, includes:

when the receiving device receives the second physical channel through afirst beam, measuring signal quality of at least one second beamassociated with the first beam according to the at least one set of beamassociating information; and

selecting, by the receiving device, a second beam with the optimalsignal quality among the at least one second beam associated with thefirst beam as a beam for receiving the first physical channel.

In an optional embodiment, the first physical channel is a downlink datachannel, and the second physical channel is a downlink control channel;or the first physical channel is an uplink data channel, and the secondphysical channel is an uplink control channel.

In an optional embodiment, the receiving, by a receiving device, atleast one set of beam associating information sent by a sending device,includes: receiving, by the receiving device, the at least one set ofbeam associating information sent by the sending device throughdedicated signaling or broadcast signaling.

In an optional embodiment, the receiving device is a terminal, and thesending device is an access network device; or the receiving device isan access network device, and the sending device is a terminal.

According to a second aspect of the embodiments of the presentdisclosure, a beam selection method is provided, the method including:

generating, by a sending device, at least one set of beam associatinginformation, where each set of the beam associating information includesan association relation between a first beam and at least one secondbeam;

sending, by the sending device, the at least one set of beam associatinginformation to the receiving device, enabling the receiving device toselect a beam to be received among beams sent by the sending deviceaccording to the at least one set of beam associating information.

In an optional embodiment, the association relation between the firstbeam and the at least one second beam includes:

an association relation between a beam ID of the first beam and a beamID of the at least one second beam; and/or an association relationbetween a physical resource associated with the first beam and aphysical resource associated with each of the at least one second beam;and/or an association relation between a reference signal associatedwith the first beam and a reference signal associated with each of theat least one second beam.

In an optional embodiment, the reference signal includes:

a Demodulation Reference Signal (DMRS) used by an uplink physicalchannel of an associated beam transmission, and/or a channel SoundingReference Signal (SRS) used by an uplink physical channel of anassociated beam transmission;

or,

a Demodulation Reference Signal (DMRS) used by a downlink physicalchannel of an associated beam transmission, and/or a beam specificreference signal (RS) of an associated beam, and/or a channel stateinformation-reference signal (CSI-RS) of an associated beam.

In an optional embodiment, the association relation between the firstbeam and the at least one second beam further includes:

a first physical channel associated with the at least one second beam,and a second physical channel associated with the first beam.

In an optional embodiment, the first physical channel is a downlink datachannel, and the second physical channel is a downlink control channel;or the first physical channel is an uplink data channel, and the secondphysical channel is an uplink control channel.

In an optional embodiment, the sending, by the sending device, the atleast one set of beam information to the receiving device, includes:

Sending, by the sending device, the at least one set of beam associatinginformation to the receiving device through dedicated signaling orbroadcast signaling.

In an optional embodiment, the receiving device is a terminal, and thesending device is an access network device; or the receiving device isan access network device, and the sending device is a terminal.

According to a third aspect of the embodiments of the presentdisclosure, a beam selection method is provided, the method includes:

receiving, by a receiving device, at least one set of beam associatinginformation sent by a sending device, where each set of the beamassociating information includes an association relation between a beamwhere a first signal is borne and a beam where a second signal is borne;

selecting, by the receiving device, a beam to be received among beamssent by the sending device according to the at least one set of beamassociating information.

In an optional embodiment, the beam where the first signal is borne isthe same beam as the beam where the second signal is borne.

In an optional embodiment, the receiving, by a receiving device, atleast one set of beam associating information sent by a sending device,includes:

receiving, by the receiving device, a Quasi Co-Located parameter sent bythe sending device, and acquiring the at least one set of beamassociating information indicated by the Quasi Co-Located parameter;

or,

receiving, by the receiving device, the at least one set of beamassociating information sent by the sending device through dedicatedsignaling.

In an optional embodiment, the first signal is a synchronization signalblock (SS block); and the second signal includes at least one of apaging signal, a channel state information reference signal (CSI-RS),and a Demodulation Reference Signal (DMRS).

In an optional embodiment, when the second signal includes a channelstate information reference signal (CSI-RS), the association relationincludes:

an association relation between an SS block and a CSI-RS resource;

and/or an association relation between an SS block and a CSI-RS port.

In an optional embodiment, when the second signal includes aDemodulation Reference Signal (DMRS), the association relation includes:

an association relation between an SS block and a DMRS port or port set.

In an optional embodiment, the selecting, by the receiving device, abeam to be received among beams sent by the sending device according tothe at least one set of beam associating information, includes:

acquiring, by the receiving device, the signal quality of each of thebeams obtained by performing measurement on the first signal in each ofthe beams;

querying, by the receiving device, according to the at least one set ofbeam associating information, a second signal associated with the firstsignal in a beam with the optimal signal quality among the beams;

selecting, by the receiving device, the beam with the optimal signalquality as a beam for receiving the second signal associated with thefirst signal in the beam with the optimal signal quality.

According to a fourth aspect of the embodiments of the presentdisclosure, a beam selection method is provided, the method includes:

generating, by a sending device, at least one set of beam associatinginformation, each set of the beam associating information includes anassociation between a beam where a first signal is borne and a beamwhere a second signal is borne;

sending, by the sending device, the at least one set of beam associatinginformation to a receiving device, enabling the receiving device toselect a beam to be received among beams sent by the sending deviceaccording to the at least one set of beam associating information.

In an optional embodiment, the beam where the first signal is borne isthe same beam as the beam where the second signal is borne.

In an optional embodiment, the sending, by the sending device, the atleast one set of beam associating information to the receiving device,includes:

sending, by the sending device, a Quasi Co-Located parameter indicatingthe at least one set of beam associating information to the receivingdevice;

or,

sending, by the sending device, dedicated signaling including the atleast one set of beam associating information to the receiving device.

In an optional embodiment, the first signal is a synchronization signalblock (SS block); and the second signal includes at least one of apaging signal, a channel state information reference signal (CSI-RS),and a Demodulation Reference Signal (DMRS).

In an optional embodiment, when the second signal includes a channelstate information reference signal (CSI-RS), the association relationincludes:

an association relation between an SS block and a CSI-RS resource;

and/or, an association relation between an SS block and a CSI-RS port.

In an optional embodiment, when the second signal includes aDemodulation Reference Signal (DMRS), the association relation includes:

an association relation between an SS block and a DMRS port or port set.

According to a fifth aspect of the embodiments of the presentdisclosure, a beam selection apparatus is provided, the beam selectionapparatus includes at least one unit, wherein the at least one unit isconfigured to implement the beam selection method provided by the firstaspect or any of the optional implementations of the first aspect.

According to a sixth aspect of the embodiments of the presentdisclosure, a beam selection apparatus is provided, the beam selectionapparatus includes at least one unit, wherein the at least one unit isconfigured to implement the beam selection method provided by the secondaspect or any of the optional implementations of the second aspect.

According to a seventh aspect of the embodiments of the presentdisclosure, a beam selection apparatus is provided, the beam selectionapparatus includes at least one unit, wherein the at least one unit isconfigured to implement the beam selection method provided by the thirdaspect or any of the optional implementations of the third aspect.

According to an eighth aspect of the embodiments of the presentdisclosure, a beam selection apparatus is provided, the beam selectionapparatus includes at least one unit, wherein the at least one unit isconfigured to implement the beam selection method provided by the forthaspect or any of the optional implementations of the forth aspect.

According to a ninth aspect of the embodiments of the presentdisclosure, a receiving device is provided, the receiving deviceincludes a processor, a memory, a transmitter and a receiver; theprocessor is configured to store one or more instructions, theinstructions are instructed to be executed by the processor, theprocessor is configured to implement the beam selection method providedby the first aspect or any of the optional implementations of the firstaspect, or the processor is configured to implement the beam selectionmethod provided by the third aspect or any of the optionalimplementations of the third aspect; the receiver is configured toimplement reception of beam associating information.

According to a tenth aspect of the embodiments of the presentdisclosure, a sending device is provided, the sending device includes aprocessor, a memory, a transmitter, and a receiver; the processor isconfigured to store one or more instructions, the instructions areinstructed to be executed by the processor, the processor is configuredto implement the beam selection method provided by the second aspect orany of the optional implementations of the second aspect, or theprocessor is configured to implement the beam selection method providedby the forth aspect or any of the optional implementations of the forthaspect; the receiver is configured to implement reception of beamassociating information.

According to an eleventh aspect of the embodiments of the presentdisclosure, a computer readable medium is provided, the computerreadable medium stores one or more instructions, the instruction isconfigured to implement the beam selection method provided by the firstaspect or any of the optional implementations of the first aspect; orthe instruction is configured to implement the beam selection methodprovided by the second aspect or any of the optional implementations ofthe second aspect; or the instruction is configured to implement thebeam selection method provided by the third aspect or any of theoptional implementations of the third aspect; or the instruction isconfigured to implement the beam selection method provided by the forthaspect or any of the optional implementations of the forth aspect.

According to a twelfth aspect of the embodiments of the presentdisclosure, a beam selection system is provided, the beam selectionsystem may include a receiving device and a sending device. Wherein thereceiving device may be a device that includes the beam selectionapparatus provided in the fifth aspect, and the sending device may be adevice that includes the beam selection apparatus provided in the sixthaspect; or the receiving device may be a device that includes the beamselection apparatus provided in the seventh aspect, the sending devicemay be a device that includes the beam selection apparatus provided inthe eighth aspect.

According to a thirteenth aspect of the embodiments of the presentdisclosure, a beam selection system is provided, the beam selectionsystem may include the receiving device provided in the tenth aspect andthe sending device provided in the eleventh aspect.

The beneficial effects of the technical solutions provided by theembodiments of the present disclosure are:

the sending device sends the association relation between the first beamand the second beam to the receiving device, and the receiving device,in the process of receiving the data sent by the sending device, mayquickly selects, according to the association relation between the firstbeam and the second beam sent by the sending device, a beam to bereceived among beams sent by the sending device, so that the step ortimes for measuring the signal quality of beams during data receivingprocess are reduced, thereby reducing the time spent on measuring beams,accelerating the process of beam measurement and selection of thereceiving device, simplifying the complexity of data receiving, andlowering the latency of data receiving.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in theembodiments of the present disclosure, the drawings used in thedescription of the embodiments will be briefly described below. It isobvious that the drawings in the following description are only someembodiments of the present disclosure, other drawings may also beobtained by those of ordinary skill in the art without any creative workaccording to these drawings.

FIG. 1 is a schematic structural diagram of a mobile communicationsystem according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a beam provided by an embodiment of thepresent disclosure;

FIG. 3 is a schematic diagram of another beam provided by an embodimentof the present disclosure;

FIG. 4 is a flowchart of a beam selection method according to anembodiment of the present disclosure;

FIG. 5 is a flowchart of another beam selection method according to anembodiment of the present disclosure;

FIG. 6 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 7 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 8 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 9 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 10 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 11 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 12 is a flowchart of yet another beam selection method according toan embodiment of the present disclosure;

FIG. 13 is a structural block diagram of a beam selection apparatusaccording to another embodiment of the present disclosure;

FIG. 14 is a structural block diagram of a beam selection apparatusaccording to another embodiment of the present disclosure;

FIG. 15 is a structural block diagram of a receiving device according toanother embodiment of the present disclosure; and

FIG. 16 is a structural block diagram of a sending device according toanother embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to make the objectives, technical schemes and advantages of thepresent disclosure more clear, implementations of the present disclosurewill be further described in detail below with reference to theaccompanying drawings.

A “module” as used herein generally refers to a program or instructionstored in a memory and is capable of performing particular functions;“unit” as used herein generally refers to a functional structure that islogically divided, the “unit” can be implemented by hardware alone or acombination of hardware and software.

“Multiple” as used herein means two or more. “and/or” describes theassociation relationship of the associated objects, indicating thatthere may be three relationships, for example, A and/or B, which mayindicate that there are three cases: A existing alone, A and B existingtogether, and B existing alone. The character “/” generally indicatesthat the contextual object is an “or” relation.

Please refer to FIG. 1, which is a schematic structural diagram of amobile communication system according to an embodiment of the presentdisclosure. The mobile communication system can be a 5G system, alsoknown as an NR system. The mobile communication system includes anaccess network device 120 and a terminal 140.

The access network device 120 may be a base station. For example, thebase station may be a base station (gNB) adopting a centralizeddistributed architecture in a 5G system. When the access network device120 adopts a centralized distributed architecture, it generally includesa central unit (CU) and at least two distributed units (DUs). Thecentral unit is provided with a Packet Data Convergence Protocol (PDCP)layer, a Radio Link Control (RLC) layer, and a Media Access Control(MAC) layer protocol stack; and the distributed unit is provided with aphysical (PHY) layer protocol stack. The specific implementation mannerof the access network device 120 is not limited in the embodiment of thepresent disclosure.

The access network device 120 and the terminal 140 establish a wirelessconnection through a wireless air interface. In an embodiment, thewireless air interface is a wireless air interface based on the fifthgeneration mobile communication network technology (5G) standard. Forexample, the wireless air interface may be a new radio (NR); or thewireless air interface may alternatively be a wireless air interfacebased on the next generation of 5G mobile communication networktechnology standards.

The terminal 140 may be a device that provides voice and/or dataconnectivity to a user. The terminal can communicate with one or morecore networks via a Radio Access Network (RAN). The terminal 140 can bea mobile terminal, such as a mobile phone (or “cellular” phone) and acomputer with a mobile terminal. For example, it can be a portable,pocket, handheld, computer built-in or in-vehicle mobile device, e.g., asubscriber unit, a subscriber station, a mobile station, a mobile, aremote station, an access point, a remote terminal, an access terminal,a user terminal, a user agent, a user device, or user equipment.

It should be noted that, in the mobile communication system shown inFIG. 1, a plurality of access network devices 120 and/or a plurality ofterminals 140 may be included, and one access network device 120 and oneterminal 140 are shown in FIG. 1 as an example, but this embodiment isnot limited thereto.

In a 5G system, a sending device can send data to a receiving device ina specific direction through a beam. The sending device may be theaccess network device 120 in the mobile communication system as shown inFIG. 1, and the receiving device may be the terminal 140. In thisinstance, the beam sent by the sending device to the receiving devicemay be referred to as a downlink beam. Or, the sending device may be theterminal 140 in the mobile communication system as shown in FIG. 1above, and the receiving device may be the access network device 120. Inthis instance, the beam sent by the sending device to the receivingdevice may be referred to as an uplink beam.

The width of different beams sent by the sending device can bedifferent. For example, in the embodiment of the present disclosure, thebeam sent by the sending device may be categorized into two types: afirst beam and a second beam. In an embodiment, one first beam may coverat least one second beam.

In a scheme of the present disclosure, a first beam covers at least onesecond beam, that is, the first beam spatially covers at least onesecond beam, or the coverage of the at least one second beam is withinthe coverage of the first beam. In some scenarios, the first beam may bereferred to as a wide beam, the second beam may be referred to as anarrow beam, or the first beam may be referred to as a large beam, andthe second beam may be referred to as a small beam. The specific namingof the first beam and the second beam is not limited in the embodimentof the present disclosure.

Different types of beams can transmit different physical channels. Forexample, the second beam can be used to transmit a data channel, so thatthe number of beams used for transmitting the data channel is larger,enabling more effective space division multiplexing while expandingsystem capacity. The first beam can be used to transmit a common channelor control channel to increase the coverage of the common channel orcontrol channel. Of course, the embodiments of the present disclosure donot limit the physical channels to be transmitted by various types ofbeams. For example, in practical applications, the first beam may alsobe used to transmit a data channel, and the second beam may also be usedto transmit a common channel or a control channel. In another possibleimplementation manner, the foregoing first beam may also not correspondto a specific physical channel.

Specifically, please refer to FIG. 2, which shows a schematic diagram ofa beam provided by an embodiment of the present disclosure. As shown inFIG. 2, the sending device sends six beams, which are beam 1 to beam 6,respectively, where beam 1 to beam 4 are second beams, that is, narrowbeams, and beam 5 and beam 6 are first beams, that is, wide beams. Also,beam 5 covers beam 1 and beam 2, and beam 6 covers beam 3 and beam 4.The sending device can send data of the data channel through the beam 1to the beam 4, and send the data of the control channel through the beam5 and the beam 6.

The schematic diagram shown in FIG. 2 is an example in which the sendingdevice sends six beams and one first beam covers two second beams. Inpractical applications, the number of beams sent by the sending deviceis not limited to six, and the number of second beams covered by onefirst beam is not limited to two, that is, the number of beams sent bythe sending device may be more or less, and the number of second beamscovered by one first beam may also be more or less. For example, pleaserefer to FIG. 3, which is a schematic diagram of a beam according to anembodiment of the present disclosure. As shown in FIG. 3, the sendingdevice sends 12 beams, which are beam 1 to beam 12, and beam 1 to beam 9are second beams, that is, narrow beams, while beam 10 to the beam 12are first beams, that is, wide beams. Also, beam 10 covers beam 1 tobeam 3, beam 11 covers beam 4 to beam 6, and beam 12 covers beam 7 tobeam 9.

Please refer to FIG. 4, which shows a flowchart of a beam selectionmethod according to an embodiment of the present disclosure. Thisembodiment is exemplified by applying the beam selection method to themobile communication system shown in FIG. 1. The method includes:

Step 401: a sending device generates at least one set of beamassociating information, where each set of the beam associatinginformation includes an association relation between a first beam and atleast one second beam.

The first beam and the second beam may be beams sent by the sendingdevice, and the first beam covers the associated at least one secondbeam.

In an embodiment, when generating the beam associating information, thesending device generates beam associating information according to thecoverage relation between the first beam and the second beam that issent by the sending device, that is, generates the association relationbetween the first beam and at least one second beam covered by the firstbeam.

For example, taking FIG. 2 as an illustration, where beam 5 covers beam1 and beam 2, beam 6 covers beam 3 and beam 4, and the sending devicecan generate an association relation between beam 5 and beam 1 and beam2 as one set of beam associating information, and another associationrelation between beam 6 and beam 3 and beam 4 as another set of beamassociating information.

Or, taking FIG. 3 as an example, where beam 10 covers beam 1 to beam 3,beam 11 covers beam 4 to beam 6, and beam 12 covers beam 7 to beam 9,and the sending device can generate an association relation between beam10 and beam 1 and beam 3 as a set of beam associating information, anassociation relation between beam 11 and beam 4 to beam 6 as another setof beam associating information, and an association relation betweenbeam 12 and beam 7 to beam 9 as yet another set of beam associatinginformation.

In the embodiment of the present disclosure, the association relationbetween the first beam and the at least one second beam in the set ofbeam associating information may be a explicit association relation oran implicit association relation.

The explicit association may be an association relation between the beamIDs of the first beam and the at least one second beam.

Or, the implicit association relation may be an association relationbetween a physical resource associated with the first beam and physicalresources associated with each of the at least one second beam. Thephysical resource may be at least one of a time domain resource, afrequency domain resource, and a code domain resource.

And/or, the implicit association relation may be an association relationbetween a reference signal associated with the first beam and referencesignals associated with each of the at least one second beam.

And/or, the implicit association relation may be an association betweena physical resource associated with the first beam and a referencesignal associated with each of the at least one second beam.

And/or, the implicit association relation may be an association betweena reference signal associated with the first beam and a physicalresource associated with each of the at least one second beam.

Of course, in a practical application, an association relation betweenthe first beam and the at least one second beam in a set of beamassociating information may simultaneously include the explicitassociation relation and the implicit association relation. In otherwords, for a set of association relation, indications may be made in aform including both explicit and implicit association relations.

In an embodiment of the present disclosure, when the first beam and thesecond beam are used to transmit different physical channels, theassociation relation between the first beam and the at least one secondbeam may include a first physical channel associated with the at leastone second beam, and a second physical channel associated with the firstbeam.

Specifically, the association relation between the first beam and the atleast one second beam includes: an identifier of the first physicalchannel associated with the at least one second beam, and an identifierof the second physical channel associated with the first beam.

Or, the association relation between the first beam and the at least onesecond beam includes: a channel type of the first physical channelassociated with the at least one second beam, and a channel type of thesecond physical channel associated with the first beam.

For example, the second beam is used to transmit a data channel, and thefirst beam is used to transmit a control channel. When the first beamand the second beam are downlink beams, for example, the sending deviceis an access network device and the receiving device is a terminal, thefirst physical channel is a downlink data channel, and the secondphysical channel is a downlink control channel. Accordingly, when thefirst beam and the second beam are uplink beams, for example, thesending device is a terminal and the receiving device is an accessnetwork device, the first physical channel is an uplink data channel,and the second physical channel is an uplink control channel, and thesending device indicates, by the beam associating information, that thephysical channel is associated with the first beam and the physicalchannel is associated with the second beam to the receiving device.

In an embodiment, when the first beam and the second beam are uplinkbeams, the reference signals used in the implicit association relationinclude: DMRS used by uplink physical channels of associated beamtransmissions, and/or SRS used by the uplink physical channel ofassociated beam transmissions.

Or, when the first beam and the second beam are downlink beams, thereference signal used in the implicit association relation includes:DMRS used by a downlink physical channel of associated beamtransmissions, and/or beam specific RS of associated beams, and/orCSI-RS of associated beams.

In practical applications, the reference signals used in the implicitassociation relation are not limited to the above four, i.e., DMRS, SRS,beam specific RS, and CSI-RS. The sending device may also select otherreference signals according to actual usage scenarios to indicate theassociation relation between the first beam and the second beam.Meanwhile, these reference signals can also be replaced by otherreference signals serving the same or similar pilot functions but havingdifferent names.

Step 402: the sending device sends at least one set of beam associatinginformation to the receiving device.

In an embodiment, the sending device sends the at least one set of beamassociating information through dedicated signaling or broadcastsignaling. For example, when the sending device is an access networkdevice, the sending device may send the at least one set of beamassociating information through dedicated signaling or broadcastsignaling; when the sending device is a terminal, the sending device maysend the at least one set of beam associating information throughdedicated signaling.

The dedicated signaling may be Radio Resource Control (RRC) signaling,etc., and the broadcast signaling may be system informationbroadcasting, etc.

Step 403: the receiving device receives at least one set of beamassociating information sent by the sending device.

Accordingly, the receiving device receives the at least one set of beamassociating information sent by the sending device through dedicatedsignaling or broadcast signaling. For example, when the sending deviceis an access network device, the receiving device may receive the atleast one set of beam associating information through dedicatedsignaling or broadcast signaling; when the sending device is a terminal,the receiving device may receive the at least one set of beamassociating information through dedicated signaling.

Step 404: the receiving device selects a beam to be received among beamssent by the sending device according to the at least one set of beamassociating information.

In the embodiment of the present disclosure, receiving a beam may meanreceiving data or signaling in a physical channel transmitted throughthe beam. Accordingly, receiving a channel, as will be described in thefollowing, may mean receiving data or a signaling in that channel.

In the embodiment of the present disclosure, the scenario of thereceiving device selecting a beam to be received among beams sent by thesending device according to the at least one set of beam associatinginformation may include, but not limited to, the following three cases.

In a first case, when the receiving device receives a first physicalchannel through a second beam, a first beam associated with the secondbeam may be selected as a beam for receiving the second physical channelaccording to the at least one set of beam associating information.

For example, the first beam is used for transmitting a control channel,and the second beam is used for transmitting a data channel. When thereceiving device is receiving the data channel through a second beam, ifthe receiving device needs to receive the control channel, it canquickly select the first beam associated with the second beam accordingto the received beam associating information, and does not need toseparately measure each first beam sent by the sending device, therebyreducing the steps of measurements on the signal quality of the beamsduring data receiving process.

In a second case, when the second physical channel is being receivedthrough the first beam, the receiving device measures the signal qualityof the at least one second beam associated with the first beam accordingto the at least one set of beam associating information, and selects thesecond beam with the beat signal quality in the at least one second beamassociated with the first beam as the beam for receiving the firstphysical channel.

For example, the first beam is used for transmitting the controlchannel, and the second beam is used for transmitting the data channel.When the receiving device is receiving the control channel through thefirst beam, if the receiving device needs to receive the data channel,it may determine a part of the second beam associated with the firstbeam according to the received beam associating information, and selecta second beam with the optimal signal quality from the determined partof second beam for receiving the data channel, without any need tomeasure all the second beams sent by the sending device separately,thereby reducing the number of measurements to be performed on thesignal quality of the beam during data reception.

In a third case, when the at least one set of beam associatinginformation includes at least two sets of beam associating information,the receiving device measures signal quality of the first beam of eachof the at least two sets of beam associating information, and thenmeasures the signal quality of the at least one second beam associatedwith the first beam with the optimal signal quality among the first beamof each of the at least two sets of beam associating information, andselects the second beam with the optimal signal quality among the atleast one second beam associated with the first beam as the receivedbeam.

Through the above method, when the sending device sends multiple secondbeams in the direction in which the receiving device is located, thereceiving device does not need to perform signal quality measurement oneach of the multiple second beams. Rather, it only need to performmeasurement on the first beam covering the multiple second beams, find afirst beam with the optimal signal quality, and at least one second beamcovered by the first beam with the optimal signal quality can be takenas the set of second beams with the optimal signal quality. Thereceiving device then performs measurement on the set of second beamswith the optimal signal quality and selects the second beam with theoptimal signal quality. Compared with performing measurement of thesignal quality for each of the second beams separately, the presentsolution can reduce the number of measurements performed about thesignal quality of the beam during data reception process.

In summary, in the beam selection method shown in the embodiment of thepresent disclosure, the sending device sends the association relationbetween the first beam and the second beam to the receiving device, andthe receiving device may, while receiving the data sent by the sendingdevice, quickly select according to the association relation between thefirst beam and the second beam sent by the sending device, a beam to bereceived among beams sent by the sending device, so that the steps ornumber for measuring the signal quality of beams during data receivingprocess are reduced, thereby reducing the time spent on performingmeasurements on the beams, accelerating the process of beam measurementand selection of the receiving device, simplifying the complexity ofdata receiving, and lowering the latency of data receiving.

It should be noted that the steps performed by the receiving device inthe embodiment shown in FIG. 4 may be separately implemented as a beamselecting method on the receiving device side, and the steps performedby the sending device in the foregoing embodiments may be separatelyimplemented as a beam selection method on the sending device side.

Please refer to FIG. 5, which is a flowchart of a beam selection methodaccording to an embodiment of the present disclosure. In thisembodiment, as an example for illustration, the beam selection method isapplied to the mobile communication system shown in FIG. 1, the sendingdevice is an access network device, the receiving device is a terminal,and the access network device sends a downlink data channel through asecond beam, and sends a downlink control channel through a firstchannel. The method includes:

Step 501: the access network device generates at least one set of beamassociating information, where each set of beam associating informationincludes an association relation between a first beam and at least onesecond beam.

In an embodiment of the present disclosure, the association relationbetween the first beam and the at least one second beam further includesat least one downlink data channel associated with the second beam, anda downlink control channel associated with the first beam.

Or, the association relation between the first beam and the at least onesecond beam may also include an identifier or a channel type of theuplink physical channel associated with the at least one second beam,and/or an identifier or a channel type of the uplink physical channelassociated with the first beam.

Step 502: the access network device sends at least one set of beamassociating information to the terminal.

In an embodiment, the access network device may send the at least oneset of beam associating information through dedicated signaling orbroadcast signaling.

Step 503: the terminal receives the at least one set of beam associatinginformation sent by the access network device.

Accordingly, the terminal may receive the at least one set of beamassociating information through dedicated signaling or broadcastsignaling.

Step 504: the terminal selects the first beam associated with the secondbeam as a beam for receiving the downlink control channel when thedownlink data channel is received through the second beam.

For example, a beam sent by the access network device may be as shown inFIG. 2, and the access network device transmits the downlink datachannel through the second beam (beam 1 to beam 4) and transmits thedownlink control channel through the first beam (beam 5 and beam 6).When the terminal is receiving the downlink data channel through beam 1,if the terminal needs to receive the downlink control channel, it doesnot have to separately perform measurements on beam 5 and beam 6.Rather, it may directly select a first beam associated with beam 1,i.e., beam 5, according to the received beam associating information,and receive the downlink control channel through beam 5.

In summary, in the beam selection method provided by the embodiment ofthe present disclosure, the access network device transmits the downlinkdata channel through the second beam, transmits the downlink controlchannel through the first beam, and notifies the terminal theassociation relation between the first beam and the second sent by theaccess network device, when the terminal receives the downlink datachannel transmitted by the access network device through the secondbeam, if the downlink control channel needs to be received, the terminalmay receive the downlink control channel directly through the first beamassociated with the second beam according to the association relationbetween the first beam and the second beam, without having to performmeasurements on each first beam sent by the access network device,thereby reducing the steps of measuring the signal quality of the beamduring the process of receiving the downlink control channel.

In an alternative embodiment based on FIG. 5, the terminal may alsoselect a second beam for receiving the downlink data channel through anassociation relation between the first beam and the second beam sent bythe access network device. In this instance, Step 504 can alternativelybe implemented as step 504 a and step 504 b, as shown in FIG. 6.

Step 504 a: the terminal performs measurement about signal quality ofthe at least one second beam associated with the first beam according tothe at least one set of beam associating information when the downlinkcontrol channel is received through the first beam.

For example, the beam sent by the access network device is as shown inFIG. 2, and the access network device transmits the downlink datachannel through the second beam (beam 1 to beam 4) and transmits thedownlink control channel through the first beam (beam 5 and beam 6).When the terminal is receiving the downlink control channel through beam5, if the terminal needs to receive the downlink data channel, it mayselect the second beam (beam 1 and beam 2) associated with beam 5 toperform measurement about signal quality according to the received beamassociating information, without having to measure the signal quality ofbeam 3 and beam 4, separately.

Step 504 b: the terminal selects the second beam with the optimal signalquality among the at least one second beam associated with the firstbeam as the beam for receiving the downlink data channel.

For example, after performing measurements about the signal quality onbeam 1 and beam 2, respectively, the terminal selects the beam with theoptimal signal quality among beam 1 and beam 2 to receive the downlinkdata channel.

In summary, in the beam selection method provided by the embodiment ofthe present disclosure, the access network device transmits the downlinkdata channel through the second beam, transmits the downlink controlchannel through the first beam, and notifies the terminal theassociation relation between the first beam and the second beam sent bythe access network device. When the terminal receives the downlink datachannel transmitted by the access network device through the first beam,if a downlink control channel needs to be received, the terminal onlyhave to perform measurement on the second beam associated with the firstbeam according to the association relation between the first beam andthe second beam, rather than all the second beam sent by the accessnetwork device, thereby reducing the number of measurements to beperformed about the signal quality of the beam during the process ofreceiving the downlink control channel.

Please refer to FIG. 7, which is a flowchart of a beam selection methodaccording to an embodiment of the present disclosure. In thisembodiment, the beam selection method is applied to the mobilecommunication system shown in FIG. 1, where the sending device is anaccess network device, and the receiving device is a terminal. Themethod includes:

Step 701: the access network device generates at least two sets of beamassociating information, each set of beam associating informationincluding an association relation between a first beam and at least onesecond beam.

In the embodiment of the present disclosure, the first beam does nothave to be any specific downlink physical channel. For example, thedifferent downlink physical channel can be transmitted through any ofthe first beam or the second beam.

Or, similar to the embodiment shown in FIG. 5 or FIG. 6, in theembodiment of the present disclosure, the first beam and the second beammay also be used to transmit different downlink physical channels,respectively.

Step 702: the access network device sends the generated at least twosets of beam associating information to the terminal.

In an embodiment, the access network device may send the at least oneset of beam associating information through dedicated signaling orbroadcast signaling.

Step 703: the terminal receives the at least two sets of beaminformation sent by the sending device.

Accordingly, the terminal may receive the at least one set of beamassociating information through dedicated signaling or broadcastsignaling.

Step 704: the terminal performs measurement about signal quality of eachfirst beam of each of the at least two sets of beam associatinginformation.

For example, the beam sent by the access network device is as shown inFIG. 3, and the access network device sends nine second beams, i.e.,beam 1 to beam 9. When the terminal needs to receive the signaling ordata sent by the access network device through a second beam, the secondbeam with the optimal signal quality needs to be selected from beam 1 tobeam 9. In the solution shown in the embodiment of the presentdisclosure, after receiving the beam associating information sent by theaccess network device, the terminal may firstly perform measurements onthe three first beams associated with the nine second beams whenselecting the received second beam, i.e., perform measurements about thesignal quality of beam 10, beam 11 and beam 12 in FIG. 3.

Step 705: the terminal performs measurement about signal quality of atleast one second beam associated with the first beam with the optimalsignal quality in the first beam of each of the two sets of beamassociating information.

After measuring the signal quality of beam 10, beam 11 and beam 12 inFIG. 3, the terminal determines the first beam with the optimal signalquality. For example, assuming that the first beam with the optimalsignal quality is the beam 11, further, the terminal performs signalquality measurement on the three second beams (i.e., beam 4 to beam 6)associated with beam 11.

Step 706: the terminal selects, among the at least one second beamassociated with the first beam with the optimal signal quality, thesecond beam with the optimal signal quality as a beam to be received.

Specifically, the terminal may select, in the at least one second beamassociated with the first beam with the optimal signal quality, thesecond beam with the optimal signal quality as a beam for receiving dataor signaling sent by the access network device.

For example, after measuring the signal quality of the second beamassociated with the first beam with the optimal signal quality (i.e.,beam 4 to beam 6 in FIG. 3), the terminal may select the beam with theoptimal signal quality in the received beam 4 to beam 6, and receivesdata or signaling sent by the access network device through the selectedbeam.

For example, taking the beam associating information including theassociation relation between the reference signal of the first beam andthe reference signal of each of the associating second beam as anexample, the terminal may measure the signal quality of beam 10, beam 11and beam 12 according to the reference signals of beam 10, beam 11 andbeam 12. After determining that beam 11 has the optimal signal qualityamong the three beams, a query may be performed to obtain theassociation relation between the reference signal of beam 11 and thereference signal of beam 4 to beam 6, According to the reference signalsof beam 4 to beam 6, the signal quality of beam 4 to beam 6 is measured,and the second beam with the optimal signal quality is selectedtherefrom.

In the above process of the embodiment of the present disclosure, whenselecting a second beam from the nine second beams shown in FIG. 3, theterminal only needs to measure the three first beams first, and thenmeasure the signal quality of the three second beams associated with thefirst beam with the optimal signal quality, and can determine thereceived second beam through six measurements before and after withoutmeasuring the nine second beams separately.

In summary, in the beam selection method provided by the embodiment ofthe present disclosure, the access network device notifies the terminalof the association relation between the first beam and the second beamsent by the access network device; when selecting a second beam from thesecond beams sent by the access network device for receiving, theterminal only needs to perform measurements on individual first beamssent by the access network device and then on the second beam associatedwith the first beam with the optimal signal quality to determine thesecond beam to be received, without having to separately performmeasurements on all the second beams sent by the access network device,thereby reducing the number measurements to be performed about thesignal quality of the beam during the process of receiving data orsignaling through the second beam.

The solution shown in FIG. 5 to FIG. 7 is described by way of exampleillustrating the sending device as the access network device and thereceiving device as the terminal. The beam selection method provided bythe present disclosure is also applicable to the case where the accessnetwork device selects a beam sent by the terminal.

Please refer to FIG. 8, which is a flowchart of a beam selection methodaccording to an embodiment of the present disclosure. This embodimentwill be illustrated by way of example, in which the beam selectionmethod is applied to the mobile communication system as shown in FIG. 1,the sending device is a terminal, the receiving device is an accessnetwork device, and the terminal sends an uplink data channel throughthe second beam, and sends an uplink control channel through the firstbeam. The method includes the following.

Step 801: the terminal generates at least one set of beam associatinginformation, where each set of beam associating information includes anassociation relation between a first beam and at least one second beam.

In an embodiment of the present disclosure, the association relationbetween the first beam and the at least one second beam further includesan uplink data channel associated with the at least one second beam, andan uplink control channel associated with the first beam.

Or, the association relation between the first beam and the at least onesecond beam may also include an identifier or a channel type of theuplink physical channel associated with the at least one second beam,and an identifier or channel type of the uplink physical channelassociated with the first beam.

Step 802: the terminal sends at least one set of beam information to theaccess network device.

In an embodiment, the terminal sending the at least one set of beamassociating information through dedicated signaling, such as RRCsignaling.

Step 803: the access network device receives at least one set of beaminformation sent by the terminal.

Accordingly, the access network device receiving the at least one set ofbeam associating information sent by the terminal through dedicatedsignaling.

Step 804: the access network device selects the first beam associatedwith the second beam as a beam for receiving the uplink control channelwhen the uplink data channel is received through the second beam.

For example, the beam transmitted by the terminal may be as shown inFIG. 2, and the terminal transmits the uplink data channel through thesecond beam (beam 1 to beam 4), and transmits the uplink control channelthrough the first beam (beam 5 and beam 6). When the access networkdevice is receiving the uplink data channel through beam 1 (i.e., thesecond beam), if the access network device needs to receive the uplinkcontrol channel, rather than having to measure the beam 5 and the beam 6separately, it may go straight to select the first beam (beam 5)associated with beam 1 according to the received beam associatinginformation and receive the uplink control channel through beam 5.

In summary, in the beam selection method provided by the embodiment ofthe present disclosure, the terminal transmits the uplink data channelthrough the second beam, transmits the uplink control channel throughthe first beam, and notifies the access network device of theassociation relation between the first beam and the second sent by theterminal; when the access network device receives the uplink datachannel transmitted by the terminal through the second beam, if theuplink control channel needs to be received, the access network devicemay directly receive the uplink control channel through the first beamassociated with the second beam according to the association relationbetween the first beam and the second beam, without having to performmeasurements on each first beam sent by the access network device,thereby reducing the steps of measuring the signal quality of the beamduring the process of receiving the uplink control channel.

In an alternative embodiment based on FIG. 8, the terminal may alsoselect a second beam for receiving the downlink data channel through anassociation relation between the first beam and the second beam sent bythe access network device. In this instance, Step 804 can alternativelybe implemented as Step 804 a and Step 804 b, as shown in FIG. 6:

Step 804 a: the access network device performs measurement about signalquality of the at least one second beam associated with the first beamaccording to the at least one set of beam associating information whenthe uplink control channel is received through the first beam.

For example, the beam sent by the access network device is as shown inFIG. 2, and the terminal transmits the downlink data channel through thesecond beam (beam 1 to beam 4) and transmits the downlink controlchannel through the first beam (beam 5 and beam 6). When the accessnetwork device receives the downlink control channel through beam 5, ifthe downlink data channel needs to be received, the access networkdevice may select the second beam (beam 1 and beam 2) associated withbeam 5 to perform measurement of signal quality according to thereceived beam associating information, without having to measure thesignal quality of beam 3 and beam 4 separately.

Step 804 b: the access network device selects the second beam with theoptimal signal quality among the at least one second beam associatedwith the first beam as the beam for receiving the uplink data channel.

For example, as shown in FIG. 2, after performing signal qualitymeasurement on beam 1 and beam 2, respectively, the access networkdevice selects to receive the uplink data channel through the beam withthe optimal signal quality in beam 1 and beam 2.

In summary, in the beam selection method provided by the embodiment ofthe present disclosure, the terminal transmits the downlink data channelthrough the second beam, transmits the downlink control channel throughthe first beam, and notifies the access network device the associationrelation between the first beam and the second sent by the terminal;when the access network device receives the uplink data channeltransmitted by the terminal through the first beam, if the uplinkcontrol channel needs to be received, the access network device cansimply perform measurement on the second beam associated with the firstbeam according to the association relation between the first beam andthe second beam, without having to perform measurement on all the secondbeam sent by the terminal, thereby reducing the number of measurementsabout the signal quality of the beam during the process of receiving theuplink control channel.

Please refer to FIG. 10, which is a flowchart of a beam selection methodaccording to an embodiment of the present disclosure. In thisembodiment, the beam selection method is applied to the mobilecommunication system as shown in FIG. 1, where the sending device is aterminal, and the receiving device is an access network device. Themethod includes the following.

Step 1001: the terminal generates at least two sets of beam associatinginformation, each set of beam associating information including anassociation relation between a first beam and at least one second beam.

In the embodiment of the present disclosure, the first beam may notcorrespond to a specific downlink physical channel. For example,different downlink physical channels can be transmitted through thefirst beam or the second beam.

Alternatively, similar to the embodiment shown in FIG. 8 or FIG. 9, inthe embodiment of the present disclosure, the first beam and the secondbeam may also be used to transmit different downlink physical channels,respectively.

Step 1002: the terminal sends the generated at least two sets of beaminformation to the terminal.

In an embodiment, the terminal sending the at least one set of beamassociating information through dedicated signaling.

Step 1003: the access network device receives the at least two sets ofbeam information sent by the sending device.

Accordingly, the access network device receiving the at least one set ofbeam associating information through dedicated signaling.

Step 1004: the access network device performs measurement about signalquality of the first beam of each of the at least two sets of beamassociating information.

For example, the beam sent by the terminal is as shown in FIG. 3, andthe terminal transmits the nine second beams of beam 1 to beam 9. Whenthe access network device needs to receive the signaling or data sent bythe terminal through the second beam, the second beam with the optimalsignal quality needs to be selected from beam 1 to beam 9. In thesolution shown in the embodiment of the present disclosure, the accessnetwork device may first measure the three first beams associated withthe nine second beams when selecting the second beam, i.e. measure thesignal quality of beam 10, beam 11 and beam 12 in FIG. 3.

Step 1005: the access network device performs measurement about signalquality of at least one second beam associated with the first beam withthe optimal signal quality in the first beam of each of the two sets ofbeam associating information.

After measuring the signal quality of beam 10, beam 11 and beam 12 inFIG. 3, the access network device determines the first beam with theoptimal signal quality, for example, assuming that the first beam withthe optimal signal quality is the beam 11, further, the access networkdevice performs signal quality measurement on the three second beams(i.e., beam 4 to beam 6) associated with beam 11.

Step 1006: the access network device selects in the at least one secondbeam associated with the first beam with the optimal signal quality, thesecond beam with the optimal signal quality as the received beam.

Specifically, the access network device may select, in the at least onesecond beam associated with the first beam with the optimal signalquality, the second beam with the optimal signal quality as a beam forreceiving data or signaling sent by the terminal.

For example, after the access network device measures the signal qualityof beam 4 to beam 6 in FIG. 3, the beam with the optimal signal qualityin beam 4 to beam 6 is selected as the beam for receiving data orsignaling.

In the above process of the embodiment of the present disclosure, whenselecting a second beam from the nine second beams shown in FIG. 3, theaccess network device only needs to measure the three first beams first,and then measure the signal quality of the three second beams associatedwith the first beam with the optimal signal quality, and can determinethe received second beam through six measurements before and afterwithout measuring the nine second beams separately.

In summary, in the beam selection method provided by the embodiment ofthe present disclosure, the terminal notifies the access network deviceof the association relation between the first beam and the second beamsent by the terminal, when selecting a second beam from the second beamssent by the terminal for receiving, the access network device only needsto measure each of the first beams sent by the terminal, and thenmeasure the second beam associated with the first beam with the optimalsignal quality, and determine the received second beam withoutseparately measuring all the second beams sent by the terminal, therebyreducing the number of times of measuring the signal quality of the beamduring the process of receiving data or signaling through the secondbeam.

It should be noted that, in the foregoing embodiments shown in FIG. 5 toFIG. 10, the steps performed by the access network device may beseparately implemented as a beam selection method on the access networkdevice side, and the steps performed by the terminal in each of theforegoing embodiments shown in FIG. 5 to FIG. 10 may be separatelyimplemented as a beam selection method on the terminal side.

Please refer to FIG. 11, which is a flowchart of a method of a beamselection method according to an embodiment of the present disclosure.This embodiment is exemplified by applying the beam selection method tothe mobile communication system shown in FIG. 1. The method includes:

Step 1101: a sending device generates at least one set of beamassociating information, where each set of beam associating informationincludes an association relation between a beam where a first signal isborne and a beam where a second signal is borne.

In an embodiment, the beam where the first signal is borne is the samebeam as the beam where the second signal is borne.

In the embodiment of the present disclosure, when the sending deviceperforms multi-beam sending by using the beamforming technology,different signals belonging to the same type may be sent on differentbeams, and multiple signals of different types may be sent on the samebeam. The sending device may generate a set of beam associatinginformation according to the first signal and the second signal on eachbeam sent by the sending device.

For example, taking FIG. 2 as an example, where beam 1 to beam 4 eachsends a first signal and a second signal, wherein the first signal sentin beam 1 is signal 11 and the second signal sent in beam 1 is 21, thefirst signal sent in beam 2 is signal 12, and the second signal sent inbeam 2 is 22, the first signal sent in beam 3 is signal 13, and thesecond signal sent in beam 3 is 23, the first signal sent in beam 4 issignal 14 and the second signal sent in beam 4 is 24. The set of beamassociating information associated with beam 1 includes the associationrelation between the beam where the signal 11 is borne and the beamwhere the signal 21 is borne. Accordingly, the set of beam associatinginformation associated with beam 2 includes association relation betweenthe beam where the signal 12 is borne and the beam where the signal 22is borne, the set of beam associating information associated with beam 3includes the association relation between the beam where the signal 13is borne and the beam where the signal 23 is borne, and the set of beamassociating information associated with beam 4 includes the associationrelation between the beam where the signal 14 is borne and the beamwhere the signal 24 is borne.

The relation between the beam where the first signal is borne and thebeam where the second signal is borne may directly be the associationrelation between the signal content of the first signal and the signalcontent of the second signal, or may be the association relation betweenthe identifier of the first signal and the identifier of the secondsignal, or may be the association relation between the signal content ofthe first signal and the identifier of the second signal, or may be theassociation relation between the identifier of the first signal and thesignal content of the second signal and so on.

Step 1102: the sending device sends, at least one set of beamassociating information to the receiving device.

In the embodiment of the present disclosure, the sending device may sendthe beam associating information through a Quasi Co-Located (QCL)parameter, that is, the sending device sends a Quasi Co-Locatedparameter indicating the at least one set of beam associatinginformation to the receiving device.

Or,

In the embodiment of the present disclosure, the sending device may alsosend the beam associating information through dedicated signaling, thatis, the sending device sends the dedicated signaling including the atleast one set of beam associating information to the receiving device,such as radio resource control (RRC) signaling.

Step 1103: the receiving device receives the at least one set of beamassociating information.

Accordingly, when the sending device can send the beam associatinginformation through the Quasi Co-Located parameter, the receiving devicereceives the Quasi Co-Located parameter sent by the sending device, andobtains at least one set of beam associating information indicated bythe Quasi Co-Located parameter.

Or,

When the sending device sends the beam associating information throughthe dedicated signaling, the receiving device receives at least one setof beam associating information sent by the sending device through thededicated signaling.

Step 1104: the receiving device selects, a beam to be received amongbeams sent by the sending device according to the at least one set ofbeam associating information.

Specifically, in the embodiment of the present disclosure, the receivingdevice can obtain the signal quality of each beam obtained by performingmeasurement on the first signal in each beam; the receiving devicequeries each second signal associated with the first signal in the beamwith the optimal signal quality according to at least one set of beamassociating information; the receiving device selects the beam with theoptimal signal quality as the beam for receiving the second signalassociated with the first signal in the beam with the optimal signalquality.

With the method shown in the embodiment of the present disclosure, thereceiving device may perform measurement on the first signal in eachbeam sent by the sending device to obtain the signal qualities of therespective beams, so as to subsequently directly query to determinewhich signal is the second signal carried in the beam with the strongestsignal according to the received beam associating information whilereceiving the second signal, thereby receiving the determined secondsignal directly through the beam with the strongest signal, without beamscanning for the second signal.

In summary, in the method shown in the embodiment of the presentdisclosure, when the receiving device needs to receive the second signalafter performing measurement on the first signal, the receiving devicedoes not need to measure the second signal, and can directly select thebeam for receiving according to the beam associating information,thereby reducing the steps or times of measuring various signals in thebeam, thereby reducing the time taken for beam measurement, acceleratingthe process of beam measurement and selection of the receiving device,and simplifying system complexity, reducing the latency of datareception.

It should be noted that the steps performed by the receiving device inthe foregoing embodiment shown in FIG. 11 may be separately implementedas a beam selection method on the receiving device side, and the stepsperformed by the sending device in the foregoing embodiments may beseparately implemented as a beam selection method on the sending deviceside.

The 5G system can cover the entire cell through different beams, thatis, each beam covers a smaller range, and the effect of multiple beamscovering the entire cell is realized by sweeping in time. Different syncsignal blocks (SS blocks) are transmitted on different beams, and theterminal can distinguish different beams by different SS blocks.

The terminal starts beam sweeping during the process of searching forthe cell, and measures different SS blocks to obtain the optimaldownlink beam (i.e., the beam with the optimal signal quality). When theterminal is in the idle mode, it also needs to select the beam with theoptimal signal quality when listening to the paging channel/signal. Whenthe terminal enters the connected state, the terminal may need tomeasure CSI-RS, different CSI-RS configurations correspond to differentbeams; similarly, at other times, the terminal may also need to measurethe beam associated with the downlink DMRS. Since the terminal hasalready measured the SS block when doing the cell selection, the systemcan indicate the association relation between the SS block and the beamsof other signals/channels by the solution shown in FIG. 4 above, and thebeam selection process can be greatly simplified when selecting beamsmeasuring other signals/channels.

Please refer to FIG. 12, which is a flowchart of a method of a beamselection method according to an embodiment of the present disclosure.In this embodiment, the beam selection method is applied to the mobilecommunication system shown in FIG. 1, where the sending device is anaccess network device, and the receiving device is a terminal. Themethod includes:

Step 1201: the access network device generates, at least one set of beamassociating information, where each set of beam associating informationincludes an association relation between a beam where the SS block(first signal) is borne and a beam where the second signal is borne.

In an embodiment, the beam where the first signal is borne is the samebeam as the beam where the second signal is borne.

The first signal is a synchronization signal block (SS block); and thesecond signal includes at least one of a paging signal, a channel stateinformation reference signal (CSI-RS), and a Demodulation ReferenceSignal (DMRS).

In the embodiment of the present disclosure, when the second signalincludes a paging signal, the foregoing association relation mayinclude: an association relation between the SS block and the pagingchannel/signal.

When the second signal includes a channel state information referencesignal (CSI-RS), the association relation includes: an associationrelation between an SS block and a CSI-RS resource; and/or anassociation relation between an SS block and a CSI-RS port.

When the second signal includes a Demodulation Reference Signal (DMRS),the association relation includes: an association relation between an SSblock and a DMRS port or port set.

Step 1202: the access network device sends at least one set of beamassociating information to the terminal.

In the embodiment of the present disclosure, the access network devicemay send a system information block (SIB) to the terminal in a broadcastmanner, and the QCL parameter carried in the SIB indicates the at leastone set of beam associating information.

Or, the access network device may also send the at least one set of beamassociating information to the terminal through dedicated signaling,such as RRC signaling.

Step 1203: the terminal receives, the at least one set of beamassociating information.

Accordingly, when the access network device sends the beam associatinginformation through the QCL parameter, the middle and high end receivesthe QCL parameter in the SIB sent by the access network device throughbroadcasts, and acquires at least one set of beam associatinginformation indicated by the QCL parameter.

Or,

When the access network device sends the beam associating informationthrough the RRC signaling, the terminal receives at least one set ofbeam associating information sent by the access network device throughthe RRC signaling.

Step 1204: the terminal selects a beam to be received among beams sentby the access network device according to the at least one set of beamassociating information.

In the embodiment of the present disclosure, the terminal may acquirethe signal quality of each beam obtained by measuring the SS block ineach beam in advance, and query the second signal associated with the SSblock in the beam with the optimal signal quality in each beam accordingto at least one set of beam associating information, and select the beamwith the optimal signal quality as the beam for receiving the secondsignal associated with the SS block in the beam with the optimal signalquality.

After receiving the beam associating information generated and sent bythe access network device, such as the QCL parameter, the terminalaccelerates the beam selection process by using the association relationbetween SS bock and other signals/channels. Specifically, for example,the access network device broadcasts two SS blocks in a 20 ms period,and the access network device also uses two beams to broadcast pagingmessages. Meanwhile, the access network device indicates the associationrelation between the two SS blocks and the two beams broadcasting thepaging message through the SIB. For example, the QCL parametersindicating SS block1 and paging message1 show that SS block1 and pagingmessage1 are sent on the same beam, and the QCL parameters indicating SSblock 2 and paging message 2 show that SS block 2 and paging message 2are sent on another beam. The terminal finds that the signal quality inthe beam direction associated with the SS block1 is the strongest whenperforms the cell search, the terminal can directly listen to the pagingmessage1 in the beam direction associated with the SS block1 accordingto the above signal association relation. It does not need to performbeam scanning on paging message1 and paging message 2 first, and thendetermine to listen to paging message1 or paging message2 according tothe result of beam scanning, thereby speeding up the process of beamselection by the terminal.

In summary, in the method shown in the embodiment of the presentdisclosure, the receiving device may perform measurement on the firstsignal in each beam sent by the sending device to obtain the signalqualities of the respective beams, so as to subsequently directly queryto determine which signal is the second signal carried in the beam withthe strongest signal according to the received signal associationrelation while receiving the second signal, thereby receiving thedetermined second signal directly through the beam with the strongestsignal, without beam scanning for the second signal, thereby reducingthe steps or times of measuring various signals in the beam, therebyreducing the time taken for beam measurement, accelerating the processof beam measurement and selection of the receiving device, andsimplifying system complexity, reducing the latency of data reception.

The following is an apparatus embodiment of an embodiment of the presentdisclosure. For the parts that are not elaborated in the apparatusembodiment, reference may be made to the technical details disclosed inthe foregoing method embodiments.

Please refer to FIG. 13, which is a schematic structural diagram of abeam selection apparatus according to an embodiment of the presentdisclosure. The beam selection apparatus can be implemented as all orpart of the receiving device by software, hardware, and a combination ofboth. The beam selection apparatus includes: a receiving unit 1301 and aprocessing unit 1302;

The receiving unit 1301 is configured to perform the foregoing step 403,step 503, step 703, step 803, step 1003, step 1103 or step 1203;

The processing unit 1302 is configured to perform the foregoing step404, or to perform step 504, or to perform step 504 a and step 504 b, orto perform step 704 to step 706, or to perform step 804, or to performsteps 804 a and 804 b, or to perform steps 1004 to 1006, or to performstep 1104, or to perform step 1204.

Please refer to FIG. 14, which is a schematic structural diagram of abeam selection apparatus according to an embodiment of the presentdisclosure. The beam selection apparatus can be implemented as all orpart of the sending device by software, hardware and a combination ofboth. The beam selection apparatus includes: a processing unit 1401 anda sending unit 1402;

The processing unit 1401 is configured to perform the foregoing step401, step 501, step 701, step 801, step 1001, step 1101, or step 1201;

The sending unit 1402 is configured to perform the foregoing step 402,step 502, step 702, step 802 or step 1002, step 1102 or step 1202.

Please refer to FIG. 15, which is a schematic structural diagram of areceiving device according to an exemplary embodiment of the presentdisclosure. The receiving device includes: a processor 21, a receiver22, a transmitter 23, a memory 24, and a bus 25.

The processor 21 includes one or more processing cores, and theprocessor 21 executes various functional applications and informationprocessing by running software programs and modules.

The receiver 22 and the transmitter 23 can be implemented as acommunication component. The communication component can be acommunication chip. The communication chip can include a receivingmodule, a sending module, a modem module, etc., for modulating and/ordemodulating information, and receiving or sending the information viawireless signal.

The memory 24 is connected to the processor 21 via a bus 25.

The memory 24 can be used to store software programs and modules.

The memory 24 can store at least one of the application modules 26described by the functions. The application module 26 can include areceiving module 261 and a selecting module 262.

The processor 21 is configured to execute the receiving module 261 toimplement the functions related to the receiving step in the foregoingvarious method embodiments; the processor 21 is configured to executethe selecting module 262 to implement the functions related to the beamselecting step in the foregoing various method embodiments.

Moreover, memory 24 can be implemented by any type of volatile ornon-volatile memory device, or a combination thereof, such as staticrandom access memory (SRAM), electrically erasable programmable readonly memory (EEPROM), erasable programmable read only memory (EPROM),programmable read only memory (PROM), read only memory (ROM), magneticmemory, flash memory, disk or optical disk.

Please refer to FIG. 16, which is a schematic structural diagram of asending device according to an exemplary embodiment of the presentdisclosure. The sending device includes a processor 31, a receiver 32, atransmitter 33, a memory 34, and a bus 35.

The processor 31 includes one or more processing cores, and theprocessor 31 executes various functional applications and informationprocessing by running software programs and modules.

The receiver 32 and the transmitter 33 can be implemented as acommunication component. The communication component can be acommunication chip. The communication chip can include a receivingmodule, a sending module, a modem module, etc., for modulating anddemodulating information, and receiving or sending the information viawireless signal.

The memory 34 is connected to the processor 31 via a bus 35.

The memory 34 can be used to store software programs and modules.

The memory 34 can store at least one of the application modules 26described by the functions. The application module 36 can include agenerating module 361 and a sending module 362.

The processor 31 is configured to execute the generating module 361 toimplement the functions of the steps of generating beam associatinginformation in the foregoing various method embodiments; the processor31 is configured to execute the sending module 362 to implement thefunctions related to the sending step in the foregoing methodembodiments;

Moreover, memory 34 can be implemented by any type of volatile ornon-volatile memory device, or a combination thereof, such as staticrandom access memory (SRAM), electrically erasable programmable readonly memory (EEPROM), erasable programmable read only memory (EPROM),programmable read only memory (PROM), read only memory (ROM), magneticmemory, flash memory, disk or optical disk.

The embodiment of the disclosure further provides a beam selectionsystem, which can include a receiving device and a sending device.

The receiving device may include the beam selection apparatus providedin FIG. 13 above, and the sending device may be the beam selectionapparatus provided in FIG. 14 above.

Or, the receiving device may be the receiving device provided in FIG. 15above, and the sending device may be the sending device provided in FIG.16 above.

Those skilled in the art should appreciate that in one or more of theabove examples, the functions described in the embodiments of thepresent disclosure may be implemented in hardware, software, firmware,or any combination thereof. When implemented in software, the functionsmay be stored in a computer readable medium or transmitted as one ormore instructions or code on a computer readable medium. Computerreadable media includes both computer storage media and communicationmedia, the communication media includes any medium that facilitatestransfer of a computer program from one location to another. A storagemedium may be any available media that can be accessed by a generalpurpose or special purpose computer.

The above are only the preferred embodiments of the present disclosure,and are not intended to limit the present disclosure. Any modification,equivalent substitution, improvement, etc., within the spirit andprinciple of the present disclosure, should be included in theprotection scope of the present disclosure.

What is claimed is:
 1. A beam selection method, comprising: receiving,by a receiving device, at least one set of beam associating informationsent by a sending device, each set of the beam associating informationcomprising an association relation between a first beam and at least onesecond beam; selecting, by the receiving device, according to the atleast one set of beam associating information, a beam to be receivedamong beams sent by the sending device.
 2. The method according to claim1, wherein the association relation between the first beam and the atleast one second beam comprises at least one of: an association relationbetween a beam ID of the first beam and a beam ID of the at least onesecond beam; an association relation between a physical resourceassociated with the first beam and a physical resource associated witheach of the at least one second beam; and an association relationbetween a reference signal associated with the first beam and areference signal associated with each of the at least one second beam.3. The method according to claim 2, wherein the reference signalcomprises: at least one of a demodulation reference signal (DMRS) usedby an uplink physical channel of an associated beam transmission, and achannel sounding reference signal (SRS) used by an uplink physicalchannel of an associated beam transmission; or, at least one of ademodulation reference signal (DMRS) used by a downlink physical channelof an associated beam transmission, a beam specific reference signal(RS) of an associated beam, and a channel state information-referencesignal (CSI-RS) of an associated beam.
 4. The method according to claim1, wherein the receiving, by a receiving device, at least one set ofbeam associating information sent by a sending device comprises:receiving, by the receiving device, the at least one set of beamassociating information sent by the sending device through dedicatedsignaling or broadcast signaling.
 5. The method according to claim 1,wherein: the receiving device is a terminal, and the sending device isan access network device; or, the receiving device is an access networkdevice, and the sending device is a terminal.
 6. A beam selectionmethod, comprising: generating, by a sending device, at least one set ofbeam associating information, wherein each set of the beam associatinginformation comprises an association relation between a first beam andat least one second beam; sending, by the sending device, the at, leastone set of beam associating information to the receiving device,enabling the receiving device to select a beam to be received amongbeams sent by the sending device according to the at least one set ofbeam associating information.
 7. The method according to claim 6,wherein the association relation between the first beam and the at leastone second beam comprises at least one of: an association relationbetween a beam ID of the first beam and a beam ID of the at least onesecond beam; an association relation between a physical resourceassociated with the first beam and a physical resource associated witheach of the at least one second beam; and an association relationbetween a reference signal associated with the first beam and areference signal associated with each of the at least one second beam.8. The method according to claim 7, wherein the reference signalcomprises: at least one of a demodulation reference signal (DMRS) usedby an uplink physical channel of an associated beam transmission, and achannel sounding reference signal (SRS) used by an uplink physicalchannel of an associated beam transmission; or, at least one of ademodulation reference signal (DMRS) used by a downlink physical channelof an associated beam transmission, a beam specific reference signal(RS) of an associated beam, and a channel state information-referencesignal (CSI-RS) of an associated beam.
 9. The method according to claim6, wherein the sending, by the sending device, the at least one set ofbeam associating information to the receiving device, comprises:sending, by the sending device, the at least one set of beam associatinginformation to the receiving device through dedicated signaling orbroadcast signaling.
 10. The method according to claim 6, wherein: thereceiving device is a terminal, and the sending device is an accessnetwork device; or, the receiving device is an access network device,and the sending device is a terminal.
 11. A receiving device,comprising: a receiver and a processor, wherein: the receiver isconfigured to receive at least one set of beam associating informationsent by a sending device, each set of the beam associating informationcomprising an association relation between a first beam and at least onesecond beam; the processor is configured to select, according to the atleast one set of beam associating information, a beam to be receivedamong beams sent by the sending device.
 12. The device according toclaim 11, wherein the association relation between the first beam andthe at least one second beam comprises at least one of: an associationrelation between a beam ID of the first beam and a beam ID of the atleast one second beam; an association relation between a physicalresource associated with the first beam and a physical resourceassociated with each of the at least one second beam; and an associationrelation between a reference signal associated with the first beam and areference signal associated with each of the at least one second beam.13. The device according to claim 12, wherein the reference signalcomprises: at least one of a demodulation reference signal (DMRS) usedby an uplink physical channel of an associated beam transmission, and achannel sounding reference signal (SRS) used by an uplink physicalchannel of an associated beam transmission; or, at least one of ademodulation reference signal (DMRS) used by a downlink physical channelof an associated beam transmission, a beam specific reference signal(RS) of an associated beam, and a channel state information-referencesignal (CSI-RS) of an associated beam.
 14. The device according to claim11, wherein: the receiver is specifically configured to receive the atleast one set of beam associating information sent by the sending devicethrough dedicated signaling or broadcast signaling.
 15. The deviceaccording to claim 11, wherein: the receiving device is a terminal, andthe sending device is an access network device; or, the receiving deviceis an access network device, and the sending device is a terminal.
 16. Abeam selection device, comprising: a processor and a transmitter; theprocessor is configured to generate at least one set of beam associatinginformation, wherein each set of the beam associating informationcomprises an association relation between a first beam and at least onesecond beam; the transmitter is configured to send the at least one setof beam associating information to the receiving device, enabling thereceiving device to select a beam to be received among beams sent by thesending device according to the at least one set of beam associatinginformation.
 17. The device according to claim 16, wherein theassociation relation between the first beam and the at least one secondbeam comprises at least one of: an association relation between a beamID of the first beam and a beam ID of the at least one second beam; anassociation relation between a physical resource associated with thefirst beam and a physical resource associated with each of the at leastone second beam; and an association relation between a reference signalassociated with the first beam and a reference signal associated witheach of the at least one second beam.
 18. The device according to claim17, wherein the reference signal comprises: at least one of ademodulation reference signal (DMRS) used by an uplink physical channelof an associated beam transmission, and a channel sounding referencesignal (SRS) used by an uplink physical channel of an associated beamtransmission; or, at least one of a demodulation reference signal (DMRS)used by a downlink physical channel of an associated beam transmission,a beam specific reference signal (RS) of an associated beam, and achannel state information-reference signal (CSI-RS) of an associatedbeam.
 19. The device according to claim 16, wherein: the transmitter isspecifically configured to send the at least one set of beam associatinginformation to the receiving device through dedicated signaling orbroadcast signaling.
 20. The device according to claim 16, wherein: thereceiving device is a terminal, and the sending device is an accessnetwork device; or, the receiving device is an access network device,and the sending device is a terminal.